Pure oxygen burner

Abstract

The utility model discloses a pure oxygen burner, which belongs to the technical field of burners and comprises a special-shaped refractory brick, a first connecting pipe is fixedly connected to the surface of the side edge of the special-shaped refractory brick, an ignition gun barrel is fixedly connected to the tail end of the first connecting pipe, and an ignition head is fixedly mounted at the tail end of the ignition gun barrel. An ignition gas channel is formed in the surface of the upper end of the ignition gun barrel, an ignition oxygen channel is formed in the side edge of the ignition gas channel and located on the ignition gun barrel, and a twist lock is arranged on the surface of the first connecting pipe. The combustion oxygen spray gun and the entrainment oxygen spray gun are matched with each other to achieve formation and expansion of a flame face in a downstream combustion chamber of the combustor, stratified combustion is achieved, generation of NOx and CO is effectively restrained, a flaring structure exists at an outlet of the special-shaped refractory brick, the flame length and rigidity are adjusted, the flame stability is enhanced, and effective fuel space distribution is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of burners, and more specifically, particularly relates to a pure oxygen burner. Background Art

[0002] NOx and CO are important atmospheric pollutants and are important factors that cause acid rain and haze. With the increasing requirements for environmental protection, the restrictions on NOx and CO emissions are becoming increasingly stringent. A large number of burners are used in the production process of the domestic industrial field. In addition to using combustion aids as combustion aids, there are also a large number of process processes that use pure oxygen as a combustion aid. At present, most industrial kilns use pure oxygen combustion heating technology, such as kilns in the glass, steel, non-ferrous metallurgy, ceramics and other industries. However, there is still a lot of room for improvement in the pollutant emissions of pure oxygen burners, and people are still working hard to find various technical means to reduce pollutant emissions. Therefore, the design of pure oxygen burners is particularly important for improving the efficiency of burners and reducing pollutant emissions.

[0003] Compared with air combustion, the combustion principle of pure oxygen combustion is significantly different. Pure oxygen combustion is the step-by-step mixing of fuel and pure oxygen in the furnace. After mixing, the fuel and pure oxygen are evenly distributed in the furnace for low-temperature diffuse combustion, which can save about 50% of fuel and reduce the amount of flue gas by more than 70%. Pure oxygen combustion can effectively save fuel and increase the combustion temperature. Since there is no N2 in the combustion agent, the generation of NOx can be greatly reduced to meet the increasingly stringent environmental protection requirements.

[0004] Among the existing patents, CN116642175A proposes a pure oxygen burner with uniform mixing. By installing a gear structure in the mixing box and dynamically adjusting the mixing structure, efficient mixing of fuel gas and oxygen is achieved, which to a certain extent solves the problem of uneven mixing caused by the small flow rate of the combustion aid in the pure oxygen burner; Patent CN219713409U proposes an energy-saving flat flame pure oxygen burner to address the problem that the flame temperature of pure oxygen combustion is high and the burner body is easily ablated. By installing a three-way adjusting piece, the spacing of the fixed ends of the spring rod is changed, thereby reducing the extrusion force between the movable end of the spring rod and the refractory brick combustion chamber, which to a certain extent prevents the problem of bending of the end of the pure oxygen spray gun due to force.

[0005] In view of the deficiencies in the prior art, the utility model provides a pure oxygen burner, which solves the common shortcomings of the existing pure oxygen burners, such as poor mixing effect of fuel and combustion aid, excessively high combustion temperature, the existence of local high temperature areas, and complex structure. When used in industrial kilns and other occasions, it is easy to cause flashback and deflagration, which in turn leads to instability during the use of the burner and increases the generation of NOx and CO. Utility Model Content

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pure oxygen burner, comprising a special-shaped refractory brick, a first connecting pipe is fixedly connected to the side surface of the special-shaped refractory brick, an end of the first connecting pipe is fixedly connected to an ignition gun barrel, an ignition head is fixedly installed on the end of the ignition gun barrel, an ignition gas channel is arranged on the upper end surface of the ignition gun barrel, an ignition oxygen channel is arranged on the side of the ignition gas channel, and the ignition oxygen channel is located on the ignition gun barrel, and a twist lock is arranged on the surface of the first connecting pipe.

[0007] Preferably, a second connecting pipe is fixedly connected to the side surface of the special-shaped refractory brick, a first fixed pipe is arranged on the side of the second connecting pipe, a first clamping fixing ring is arranged at the connection between the first fixed pipe and the second connecting pipe, a roll oxygen spray gun is detachably installed on the side surface of the first fixed pipe, a first fixing nut is threadedly installed at the connection between the roll oxygen spray gun and the first fixed pipe, and an oxygen suction channel is fixedly connected to the air inlet end of the roll oxygen spray gun.

[0008] Preferably, a third connecting pipe is fixedly connected to the side surface of the special-shaped refractory brick, a second fixed pipe is arranged at the end of the third connecting pipe, a second clamping fixing ring is arranged on the surfaces of the third connecting pipe and the second fixed pipe, a combustion oxygen spray gun is arranged on the side surface of the second fixed pipe, and a second fixing nut is arranged at the connection between the second fixed pipe and the combustion oxygen spray gun.

[0009] Preferably, a combustion gas channel is provided on the surface of the combustion oxygen spray gun, a combustion oxygen channel is provided on the side of the combustion gas channel, and the combustion oxygen channel is located on the surface of the combustion oxygen spray gun.

[0010] Preferably, a fourth connecting pipe is fixedly connected to the side surface of the special-shaped refractory brick, and a flame detector is fixedly connected to the end of the fourth connecting pipe.

[0011] Preferably, a flame nozzle is provided at the end of the special-shaped refractory brick.

[0012] The utility model provides a pure oxygen burner, which has the following beneficial effects:

[0013] 1. In the pure oxygen burner, the combustion oxygen spray gun and the entrainment oxygen spray gun cooperate with each other to realize the formation and expansion of the flame surface in the combustion chamber downstream of the burner, and realize stratified combustion, effectively suppressing the generation of NOx and CO.

[0014] 2. In the pure oxygen burner, there is a flared structure at the outlet of the special-shaped refractory bricks. On the one hand, it adjusts the flame length and rigidity, enhances the stability of the flame, and forms an effective fuel space distribution; on the other hand, it can draw the flue gas after combustion into the root of the flame to cool the root of the flame, thereby greatly reducing the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall right side view of the utility model;

[0016] Figure 2 For the utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 It is the overall left side view of the utility model;

[0018] Figure 4 It is the overall rear view of the utility model.

[0019] In the figure: 1. ignition gun barrel; 2. ignition gas channel; 3. ignition oxygen channel; 4. ignition head; 5. first connecting pipe; 6. twist lock; 7. special-shaped refractory brick; 8. roll oxygen suction gun; 9. roll oxygen suction channel; 10. second connecting pipe; 11. first fixing pipe; 12. first fixing nut; 13. first clamping fixing ring; 14. combustion oxygen gun; 15. combustion gas channel; 16. combustion oxygen channel; 17. third connecting pipe; 18. second clamping fixing ring; 19. second fixing pipe; 20. second fixing nut; 21. flame detector; 22. fourth connecting pipe; 23. flame nozzle. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] See also Figures 1 to 4 The utility model provides a technical solution: a pure oxygen burner, comprising an ignition barrel 1, a right ignition head 4 is installed at the end of the ignition barrel 1, an ignition flame is formed by the ignition head 4, an ignition gas channel 2 and an ignition oxygen channel 3 are arranged on the surface of the ignition barrel 1, a small amount of gas is injected into the ignition barrel 1 through the ignition gas channel 2, and oxygen required for combustion is injected into the ignition barrel 1 through the ignition oxygen channel 3.

[0022] In this embodiment, please refer to Figure 1 A first connecting tube 5 is provided on the side of the ignition barrel 1, and the first connecting tube 5 is fixedly installed on the surface of the special-shaped refractory brick 7. At this time, the ignition barrel 1 is fixed by a twist lock 6 provided on the surface of the first connecting tube 5, and the ignition barrel 1 is tilted at a certain angle to facilitate the subsequent ignition.

[0023] In this embodiment, please refer to Figure 1 and Figure 2The interior of the special-shaped refractory brick 7 is a hollow structure. A second connecting pipe 10 is fixedly installed on the side surface of the special-shaped refractory brick 7. The second connecting pipe 10 is connected to the inside of the special-shaped refractory brick 7, which plays a role of mutual communication. A first fixing pipe 11 is arranged on the side of the second connecting pipe 10, and is fixedly connected by a first clamping fixing ring 13, which is convenient for disassembly and installation.

[0024] In this embodiment, please refer to Figure 1 and Figure 2 An oxygen lance 8 is installed at the end of the first fixed tube 11, and then the oxygen lance 8 is fixedly installed through a first fixing nut 12 on the surface of the first fixed tube 11. At the same time, an oxygen channel 9 is fixedly connected to the end of the oxygen lance 8. External oxygen can be sucked into the cavity of the special-shaped refractory brick 7 through the oxygen channel 9 to ensure the subsequent combustion effect.

[0025] In this embodiment, please refer to Figure 3 A third connecting pipe 17 is fixedly connected to the side surface of the special-shaped refractory brick 7. At the same time, a second fixing pipe 19 is arranged on the side of the third connecting pipe 17 and fixed by a second clamping fixing ring 18 to facilitate subsequent installation.

[0026] In this embodiment, please refer to Figure 3 The combustion oxygen spray gun 14 is installed inside the second fixing tube 19 and then fixed by the second fixing nut 20, so that the combustion oxygen spray gun 14 can be fixed and can also be disassembled, which is convenient for subsequent replacement and cleaning.

[0027] In this embodiment, please refer to Figure 3 The upper end of the combustion oxygen spray gun 14 is provided with two channels, a combustion gas channel 15 and a combustion oxygen channel 16. The combustion gas channel 15 is used to provide the combustion oxygen spray gun 14 with fuel gas, while the combustion oxygen channel 16 is used to provide the combustion oxygen spray gun 14 with oxygen to ensure the combustion effect.

[0028] In this embodiment, please refer to Figure 3 The side surface of the special-shaped refractory brick 7 is fixedly connected to the fourth connecting pipe 22, and the end of the fourth connecting pipe 22 is fixedly connected to the flame detector 21 for monitoring the flame level inside the special-shaped refractory brick 7.

[0029] In this embodiment, please refer to Figure 4 A flame nozzle 23 is provided at the end of the special-shaped refractory brick 7. There is a flaring structure at the flame nozzle 23. On the one hand, it adjusts the flame length and rigidity, enhances the stability of the flame, and forms an effective fuel space distribution; on the other hand, it can draw the smoke after combustion into the flame root to cool the flame root, thereby greatly reducing the generation of nitrogen oxides.

[0030] The specific usage and function of this embodiment are as follows:

[0031] During the use of the burner, an ignition flame is first formed by the ignition gun barrel 1 and the ignition head 4, and then the main flame downstream of the combustion oxygen spray gun 14 is ignited. The flame is detected by the flame detector 21. The main flame forms a recirculation zone structure in the special-shaped refractory brick 7, which entrains the secondary oxygen from the entrainment oxygen channel 9 to further adjust the flame shape. A low-speed flame stabilization zone is formed in the combustion chamber of the special-shaped refractory brick 7. The injection amount of secondary oxygen can adjust the length of the flame. The higher amount of secondary oxygen accelerates the rapid reaction of the fuel gas downstream of the special-shaped refractory brick 7, and the flame length is short. The less secondary oxygen prolongs the mixing time of the fuel gas and oxygen, and it is easy to form a long jet flame with strong rigidity downstream of the special-shaped refractory brick 7. The mutual cooperation of the combustion oxygen spray gun 14 and the entrainment oxygen spray gun 8 realizes the formation and expansion of the flame surface in the combustion chamber downstream of the burner, and realizes stratified combustion, effectively suppressing the generation of NOx and CO. There is a flared structure at the outlet of the special-shaped refractory brick 7, which, on the one hand, adjusts the flame length and rigidity, enhances the flame stability, and forms an effective fuel spatial distribution; on the other hand, it can draw the combusted flue gas into the flame root to cool the flame root, thereby greatly reducing the generation of nitrogen oxides.

Claims

1. A pure oxygen burner, comprising a special-shaped refractory brick (7), characterized in that: A first connecting tube (5) is fixedly connected to the side surface of the special-shaped refractory brick (7); an ignition gun barrel (1) is fixedly connected to the end of the first connecting tube (5); an ignition head (4) is fixedly installed at the end of the ignition gun barrel (1); an ignition gas channel (2) is arranged on the upper end surface of the ignition gun barrel (1); an ignition oxygen channel (3) is arranged on the side of the ignition gas channel (2); and the ignition oxygen channel (3) is located on the ignition gun barrel (1); and a twist lock (6) is arranged on the surface of the first connecting tube (5).

2. A pure oxygen burner according to claim 1, characterized in that: A second connecting pipe (10) is fixedly connected to the side surface of the special-shaped refractory brick (7), a first fixing pipe (11) is arranged on the side of the second connecting pipe (10), a first clamping fixing ring (13) is arranged at the connection between the first fixing pipe (11) and the second connecting pipe (10), a roll oxygen spray gun (8) is detachably mounted on the side surface of the first fixing pipe (11), a first fixing nut (12) is threadedly mounted at the connection between the roll oxygen spray gun (8) and the first fixing pipe (11), and an air inlet end of the roll oxygen spray gun (8) is fixedly connected to a roll oxygen channel (9).

3. A pure oxygen burner according to claim 1, characterized in that: A third connecting pipe (17) is fixedly connected to the side surface of the special-shaped refractory brick (7), a second fixing pipe (19) is arranged at the end of the third connecting pipe (17), a second clamping fixing ring (18) is arranged on the surface of the third connecting pipe (17) and the second fixing pipe (19), a combustion oxygen lance (14) is arranged on the side surface of the second fixing pipe (19), and a second fixing nut (20) is arranged at the connection between the second fixing pipe (19) and the combustion oxygen lance (14).

4. A pure oxygen burner according to claim 3, characterized in that: A combustion gas channel (15) is provided on the surface of the combustion oxygen spray gun (14), a combustion oxygen channel (16) is provided on the side of the combustion gas channel (15), and the combustion oxygen channel (16) is located on the surface of the combustion oxygen spray gun (14).

5. A pure oxygen burner according to claim 1, characterized in that: A fourth connecting pipe (22) is fixedly connected to the side surface of the special-shaped refractory brick (7), and a flame detector (21) is fixedly connected to the end of the fourth connecting pipe (22).

6. A pure oxygen burner according to claim 5, characterized in that: The end of the special-shaped refractory brick (7) is provided with a flame nozzle (23).

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